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Distribution of nutrients and toxic metals in the Brahmaputra River Basin

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Title Distribution of nutrients and toxic metals in the Brahmaputra River Basin
-
 
Contributor Ramakrishnn, P S
Mahanta, Chandan
 
Subject Environmental science
Bharmaputra river basin
Nutrients
Toxics
metals
 
Description Sediments are important sinks for land derived contaminants, especially for toxic metals and have been widely used to identify sources of pollution, to evaluate its extent and to diagnose the environmental
newlinequality of aquatic systems. The level of pollutants immobilized in the
newlinesediment depends not only on the physical, chemical and biological
newlineproperties of the sediment, but also on the background levels of the
newlinepollutants. It is thus essential to understand the background
newlineconcentrations since a river system will be used more and more intensely
newlinefor effluent/sewage discharge and for dumping wastes.
newlineUntil now almost no data have been reported on the organic matter,
newlinenutrients and heavy metals in the sediments and biota of the Brahmaputra
newlineBasin. These baseline data are also important in designing long term
newline~nagement and conserv4tion policies of this as well as other similar large
newlinetrop-ica 1 river bas ins.
newlineThe present work broadly is an effort to evaluate the particulate
newlineelement distribution summarising results of several field investigations.
newlineIt is also an attempt to explain the composition of the bed sediment and
newlinethe suspended particulates (SPM) in relation to source and in- situ
newlineparticle production by use of interrelations between the SPM
newlinecharacteristics and nutrient as well as trace element concentrations. Forthe
newlinefirst time, a study of distribution of flux of metals and some
newlineimportant nutrients have been attempted together for the
newlineriver. With the help of important geochemical parameters
newlineBrahmaputra
newlinelike metals,
newlinecarbon, phosphorous, nitrogen and other nutrients in particulates, sediment
newline1
newlinesize distribution and mineralogy in the basin, distribution of organic
newlinematters, toxic metals, nutrients and their fluxes have been attempted to
newlineexplain. The spatial and seasonal variations of these elements were also
newlineinvestigated.
newlineThe main objective of the present study was to examine the nature
newlineand the processes of distribution and transport of major heavy metals (Fe,
newlineMn, Cu, Pb, Zn, Sr, Ni and Cd) and other nutrients (P, C
References given
 
Date 2013-12-26T09:03:03Z
2013-12-26T09:03:03Z
2013-12-26
n.d.
1995
n.d.
 
Type Ph.D.
 
Identifier http://hdl.handle.net/10603/14259
 
Language English
 
Relation -
 
Rights university
 
Format iv,156p.
-
None
 
Coverage Environmental science
 
Publisher Delhi
Jawaharlal Nehru University
School of Environmental Sciences
 
Source INFLIBNET